Improvement in casings and gates for turbine water-wheels



S. L. DENNEY & W. MERCER.'

Casings and Gates for Turbine Water-Wheel.`

N0, 132,358, Patented Oct. 22,1872.

je! J UNITED STATES PATENT OFFICE.

SAMUEL L. DENNEY', OF GAP, AND WILLIAM MERCER, OF CHRISTIANA,PENNSYLVANIA.

IMPROVEMENT IN CASINGS AND-GATES FOR TURBINE WATER-WHEELS.

Specification formingpart of Letters Patent No. 132,358, dated Octoberl22, 18.72.

To all whom it may concern:

Be it known that I, SEMI.. L. DENNEY, of Gap, 'Lancaster county, andWILLIAM MER- CER, of Christiana, Lancaster county, Pennsylvania, haveinvented certain Improvements in the Casing and Gates for TurbineWater-Wheels, of which the following is a specification The first partof our invention relates to the tapered form given to the outer surfaceof i the wheel-casing c andthe corresponding shape of tle inner surfaceof the gate-ring B,- whereby we secure a close-fittin g gate, which willeft'ectually prevent the Wasting of the water while the wheel isstanding. The second part of our invention relates to the combination ofthe gate-ring B with the gate-ring C, whereby we can close a portion ofthe gates at regular intervals around the wheel, while the remaininggates are left open to their full extent.

Figure 1 is a top view; Fig. 2 is an elevation 5 and Fig. 3, ahorizontal section.A

a is the casing which surrounds the wheel, and which is provided withgates corresponding with the buckets in the wheel. The outer surface ofthe casing c is turned with a slight taper. The inner surface of thegate-ring B is fitted to a eorrespondin g shape, which, whenV puttogether, forms a joint which will notleak from usage, but will continueto wear and remain tight. To the casing a are secured the incline-ways EE, and, also, to the gate-ring similar ways are secured. The gate beingrevolved to the left until it is arrested by the stop F on the casing a,the apertures will be closed against the admission of the water to thewheel; then, by the reverse movement of the shifting device G, thegate-ring is revolved, and, at the same time, raised just suficiently tofree it from the casing of the contact of the inclined ways E E, thusfacilitating its free and easy movement in opening and closing the gate.

It will be readily seen that a gate-rin g constructedwith this taperedform and not provided With the means for raising it simultaneously withits rotating movement, the corroding of the metal surfaces would causethe gate to adhere so rmly to the casing as to render the workin g ofthe gate impracticable,

and thereby destroy the advantages hereby secured in a perfectly-ttingand easily-operated gate.

Il is a secondary gate-ring fitting over gate supply of water to thewheel through gate B.

Vhen the full power of' the Wheel is not required to perform theimmediate work, water is saved and power gained by closing a portion ofthe apertures in the casing and allowing a full flow of Water throughthe others over that of partially closing all of the apertures andadmittingonly a partial ow through each and all of the apertures; and toeffect this closing of the apertures and shutting oft the low of waterfrom every other aperture when the vwheel is running, it is onlynecessary to shift the gate H by mea-,ns of the device G until theopposite end vof the slot K is brought against pin L, when the apertureswill be closed. By reversing the gate the apertures will all be openedthrough gate B to the Wheel.

It is not necessary to fit the secondary gate H with that degree ofaccuracy that gate B is iitted, as it serves only as a regulator whilethe Wheel is running; consequently, the surfaces may be straight ortapered, as experiencel may determine.

We claim as our invention- 1. The combination of the wheel-casing a,gate-ring B, and inclined ways E E E E, substantially as and for thepurpose hereinbefore set forth.

2. The combination with the wheel-Casin g a, gate-ring B, inclined WaysE E E E, and secondary gate-ring H, substantially as and for the purposehereinbefore set forth.

SAMUEL L. DENNEY. VILLIAM MERCER.

i Witnesses:

SARAH L. DENNEY, M. I. DENNEY.

